/btw[question]

Asks a side question about the current session without adding it to the conversation. Without a question, shows your most recent side question.

Best use

Mid-task you want to understand an error: /btw what does this 404 mean without derailing the main thread.

/clearStart a fresh conversation (the old one stays resumable)
/compactSummarize a long conversation to free space
/contextSee what is filling the context window
/planGet a plan first; edits wait for your approval
/resumeGo back to an earlier conversation
/rewindUndo: roll code and conversation back
/autocompactSets how full the context window gets before automatic compaction, e.g.
/branchCreates a branch of the conversation at this point and switches into it; the original is preserved and reachable via /resume.